Hair Comb not working
Delete any "custom NORMALS" / VERTEX GROUPS on your object properties. Delete any other irrelevant information (this is caused by a smooth group from other software).

Also check you don´t have UNchecked the EYE icon and the EDIT icon on one of your modifiers. This is the reason why you see something in Edit mode and then another on Object mode.

Last but not least, like it´s been mentioned, you have to CTRL+A your rug to apply transformations.

Thank you if you vote my answer.

BFCT_Schiller.